/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: Lenovo
 * Date: 2025-04-19
 * Time: 23:00
 */
public class Main {
    public static void main(String[] args) {
        Integer[] a = {10, 50};
        Util.swap(a, 0, 1); // 正确调用：类名+方法，使用有效索引
    }
}
